Question

one cannot hear the sound of clapping on the moon
$give \: reason$

Answer 1

because sound is a mechanical wave which need medeum to travel at moon no medeum is available there fore we unable hear sound

Answer 2

Sound requires a medium of propogation where there is concentration of molecules so that it can travel. This medium can be solid , liquid or gas. This is because in solid, liquid and gases , these molecules are present.

Vacuum is a region where there is no air , hence no concentration of molecules. So, sound cannot travel through vacuum and as a result it cannot enter our ears.

Thus , a person will not be able to hear the sound of clapping on moon.